如何用WPF实现一个最简单的Mvvm示例

基类NotificationObject
class NotificationObject:INotifyPropertyChanged //ViewModel的基类,作用是通知ViewModels的变化
    {
       public event PropertyChangedEventHandler PropertyChanged;
       public void RaisePropertyChanged(string propertyName)
        {
           if (this.PropertyChanged!=null)
            {
                this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }
简单基类DelegateCommand 
class DelegateCommand:ICommand
{
    public boolCanExecute(object parameter)
    {
        if (this.CanExecuteFunc==null)
        {
            return true;
        }
       return this.CanExecuteFunc(parameter);
    }
    public event EventHandler CanExecuteChanged;
    public void Execute(object parameter)
    {
        if (this.ExecuteAction==null)
        {
            return;
        }
        this.ExecuteAction(parameter);
    }
    public Action